/*
 * CodePress - Real Time Syntax Highlighting Editor written in JavaScript - http://codepress.org/
 * 
 * Copyright (C) 2006 Fernando M.A.d.S. <fermads@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the 
 * GNU Lesser General Public License as published by the Free Software Foundation.
 * 
 * Read the full licence: http://www.opensource.org/licenses/lgpl-license.php
 */

CodePress = function (obj) {
    var self = document.createElement('iframe');
    self.textarea = obj;
    self.textarea.disabled = true;
    self.textarea.style.overflow = 'hidden';
    self.style.height = self.textarea.clientHeight + 'px';
    self.style.width = self.textarea.clientWidth + 'px';
    self.textarea.style.overflow = 'auto';
    self.style.border = '1px solid gray';
    self.frameBorder = 0; // remove IE internal iframe border
    self.style.visibility = 'hidden';
    self.style.position = 'absolute';
    self.options = self.textarea.className;

    self.initialize = function () {
        self.editor = self.contentWindow.CodePress;
        self.editor.body = self.contentWindow.document.getElementsByTagName('body')[0];
        self.editor.setCode(self.textarea.value);
        self.setOptions();
        self.editor.syntaxHighlight('init');
        self.textarea.style.display = 'none';
        self.style.position = 'static';
        self.style.visibility = 'visible';
        self.style.display = 'inline';
    }

    // obj can by a textarea id or a string (code)
    self.edit = function (obj, language) {
        if (obj) self.textarea.value = document.getElementById(obj) ? document.getElementById(obj).value : obj;
        if (!self.textarea.disabled) return;
        self.language = language ? language : self.getLanguage();
        self.src = CodePress.path + 'codepress.html?language=' + self.language + '&ts=' + (new Date).getTime();
        if (self.attachEvent) self.attachEvent('onload', self.initialize);
        else self.addEventListener('load', self.initialize, false);
    }

    self.getLanguage = function () {
        for (language in CodePress.languages)
            if (self.options.match('\\b' + language + '\\b'))
                return CodePress.languages[language] ? language : 'generic';
    }

    self.setOptions = function () {
        if (self.options.match('autocomplete-off')) self.toggleAutoComplete();
        if (self.options.match('readonly-on')) self.toggleReadOnly();
        if (self.options.match('linenumbers-off')) self.toggleLineNumbers();
    }

    self.getCode = function () {
        return self.textarea.disabled ? self.editor.getCode() : self.textarea.value;
    }

    self.setCode = function (code) {
        self.textarea.disabled ? self.editor.setCode(code) : self.textarea.value = code;
    }

    self.toggleAutoComplete = function () {
        self.editor.autocomplete = (self.editor.autocomplete) ? false : true;
    }

    self.toggleReadOnly = function () {
        self.textarea.readOnly = (self.textarea.readOnly) ? false : true;
        if (self.style.display != 'none') // prevent exception on FF + iframe with display:none
            self.editor.readOnly(self.textarea.readOnly ? true : false);
    }

    self.toggleLineNumbers = function () {
        var cn = self.editor.body.className;
        self.editor.body.className = (cn == '' || cn == 'show-line-numbers') ? 'hide-line-numbers' : 'show-line-numbers';
    }
    self.isActive = function () {
        return self.textarea.disabled;
    }
    self.toggleEditor = function () {
        if (self.textarea.disabled) {
            self.textarea.value = self.getCode();
            self.textarea.disabled = false;
            self.style.display = 'none';
            self.textarea.style.display = 'inline';
        }
        else {
            self.textarea.disabled = true;
            self.setCode(self.textarea.value);
            self.editor.syntaxHighlight('init');
            self.style.display = 'inline';
            self.textarea.style.display = 'none';
        }
    }

    self.edit();
    return self;
}

CodePress.languages = {
    csharp:'C#',
    css:'CSS',
    generic:'Generic',
    html:'HTML',
    java:'Java',
    javascript:'JavaScript',
    perl:'Perl',
    ruby:'Ruby',
    php:'PHP',
    text:'Text',
    sql:'SQL',
    vbscript:'VBScript'
}
